Question

Use synthetic substitution to find P(c) for the given polynomial P(x) and the given number x:
P(x) = 4x3 - 2x2 + x - 1; c = -0.5

Answer 1

i get -2.5

Answer 2

thanks :)

Answer 3

For those who never heard of synthetic substitution:

http://hanlonmath.com/pdfFiles/29.SyntheticSubstitution.pdf

42 millionths of a second for Mathematica Home Edition:\[\text{Timing}\left[4 x^3-2 x^2+x-1\text{/.}x \to -0.5\right]\text{ -$>$ }\{0.000042,-2.5\} \]